i have a 93 b18a1 sitting in the garage with the crx si wiring harness on it except that there is a green plug on the back of the block next to the oil filter that i dont know what it is for. Also on the crx si wiring harness there is a squarish two pin plug and another two wires into some kind of rubber boot that i dont know what they are for. Ive already run the fan switch to the thermo housing. Also im using obd1 injectors and obd1 distributor and have them wired up already with a rywire obd0-obd1 conversion and sub harness. Any help would be much appreciated im trying to at least get the wiring done today.

 

When I did my B18 swap into my '89 ef I had to rebuild me whole harness and the only to connectors I remember being back there were the coolant switch, like you said, and the other was my oil pressure switch. I remember that one because I had to beat the fender well some to fit the engine and the hammer rebounded more than I thought and hit it, and by physics - smashed it